CN114934865A

CN114934865A - Engine intake manifold assembly and control method

Info

Publication number: CN114934865A
Application number: CN202210571769.3A
Authority: CN
Inventors: 姜思君; 孙钰翔; 刘道远; 曲函师; 万济录; 孙博; 崔石柱; 张�杰
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-08-23

Abstract

The application provides an engine intake manifold assembly and a control method, the engine intake manifold assembly comprises: the air inlet manifold is connected with the throttle valve, and the air inlet manifolds are connected with the air inlet manifold; the multiple intake manifolds are connected with multiple cylinders of the multi-cylinder engine in a one-to-one correspondence manner; a shutoff valve for adjusting the air inflow of the corresponding cylinder is assembled in each air inlet manifold; the engine intake manifold assembly also comprises a central control system and a crankshaft timing signal detection mechanism for detecting the combustion uniformity of each cylinder of the multi-cylinder engine; and after receiving the signal of the crankshaft timing signal detection mechanism, the central control system controls the plurality of shutoff valves to correspondingly adjust the air inflow so that the combustion of the plurality of cylinders is consistent. In the above description, the flow area of the intake manifold channel of each cylinder is independently adjusted, so that the combustion uniformity of each cylinder is ensured. In addition, the application also provides a control method of the engine intake manifold assembly, and the control method enables the combustion of a plurality of cylinders to be consistent or realizes a cylinder closing function.

Description

Engine intake manifold assembly and control method

Technical Field

One or more embodiments of the present disclosure relate to the field of engine systems, and more particularly, to an engine intake manifold assembly and control method.

Background

When the engine burns at idle speed and other small-load working condition points, the air input of each cylinder of the engine is obviously different due to less air input and inconsistent length, position and air flow state of an air inlet manifold of each cylinder, the combustion state is uneven, the combustion consistency is poor, and the NVH (Noise, Vibration and Harshness) of the whole vehicle is poor when the engine works at the idle speed and the small-load working condition; the large-displacement engine can effectively reduce the oil consumption of the whole vehicle by adopting a cylinder closing method under a small-load working condition.

In the process of developing a multi-cylinder engine, the problem of poor combustion stability of individual cylinders can be found due to different air inlet conditions of cylinders of the engine at the idle speed and the small load working point of the engine, the problem of poor combustion consistency of the cylinders is solved by adjusting the oil injection quantity of the cylinders of the engine at present, but the combustion torque of the cylinders of the engine is inconsistent, and the NVH of the engine is deteriorated due to the measure. Meanwhile, in order to realize the cylinder closing function of the engine, a complex device is generally required to be installed so as to close the cylinder inlet function of the individual cylinder of the engine to realize the cylinder closing capability.

Disclosure of Invention

In view of this, one or more embodiments of the present disclosure are directed to an engine intake manifold assembly and a control method thereof, which have a simple structure, can solve the problem of inconsistent intake air amount of each cylinder, and can satisfy the cylinder closing function of the engine, thereby improving NVH of the entire vehicle, reducing oil consumption of the entire vehicle, and having a broad application prospect.

In a first aspect, an engine intake manifold assembly comprises: the air conditioner comprises an air inlet main pipe connected with a throttle valve and a plurality of air inlet manifolds connected with the air inlet main pipe; wherein the content of the first and second substances,

the multiple intake manifolds are connected with multiple cylinders of the multi-cylinder engine in a one-to-one correspondence manner;

a shutoff valve for adjusting the air inflow of the corresponding cylinder is assembled in each air inlet manifold;

the engine intake manifold assembly also comprises a central control system and a crankshaft timing signal detection mechanism for detecting the combustion uniformity of each cylinder of the multi-cylinder engine;

and after receiving the signal of the crankshaft timing signal detection mechanism, the central control system controls a plurality of shutoff valves to correspondingly adjust the air inflow so that the combustion of the cylinders is consistent.

In the above description, the flow area of the intake manifold channel of each cylinder is independently adjusted, so that the combustion uniformity of each cylinder is guaranteed, the structure is simple, the problem of inconsistent air inflow of each cylinder can be solved, the cylinder closing function of the engine can be met, the NVH of the whole vehicle is improved, the oil consumption of the whole vehicle is reduced, and the application prospect is wide.

In a specific possible embodiment, the longitudinal section of the intake manifold is trumpet-shaped, and the conical end of the intake manifold, which is far away from the intake manifolds, is a throttle intake port. Air is introduced through the throttle and diffused.

In a specific embodiment, a plurality of intake manifolds are arranged at the open end of the intake manifold. The air input is fully ensured to be distributed.

In a specific possible embodiment, the shutoff valve is horizontally fitted in the cross-sectional direction of the corresponding intake manifold. And independently adjusting the flow area of the air inlet manifold channel of each cylinder.

In a specific implementation scheme, the central control system enables the multi-cylinder engine to enable a plurality of cylinders to be combusted uniformly and/or operated in a closed cylinder mode in an idling state by controlling a plurality of the shutoff valves. Under the state of the idling or small load working condition of the engine, the NVH of the whole vehicle is improved, and the oil consumption of the whole vehicle is reduced.

In a specific possible embodiment, when the central control system makes the multi-cylinder engine make the combustion of a plurality of cylinders consistent in an idle state by controlling a plurality of the shutoff valves:

the crankshaft timing signal detection mechanism judges any cylinder with poor combustion, and the central control system controls the air inflow of the other cylinders to be consistent with the air inflow of the cylinder with poor combustion. And the NVH of the whole vehicle is improved.

In a specific possible embodiment, when the central control system causes the multi-cylinder engine to operate in the idle state with the cylinders closed by controlling the plurality of shutoff valves:

the central control system controls the shut-off valve in the intake manifold of the cylinder to be closed to be completely closed. The oil consumption of the whole vehicle is reduced.

In a second aspect, a method of controlling an engine intake manifold assembly, includes the steps of:

detecting that the delay combustion of each cylinder is inconsistent, and judging the cylinder with poor combustion;

a shutoff valve for adjusting an intake manifold of a cylinder having a large intake air amount; making the air inflow of the cylinder with larger air inflow consistent with the air inflow of the cylinder with poorer combustion;

detecting whether the combustion of each cylinder is consistent again; if the combustion of each cylinder is not consistent, the steps are repeated;

and finishing the adjustment until the combustion of each cylinder is consistent.

In a specific embodiment, the method further comprises the following steps:

receiving a cylinder closing function opening requirement, and sending a cylinder closing operation instruction by the central control system;

closing a shutoff valve of an intake manifold needing to be closed, and controlling the shutoff valve to be completely closed by a central control system;

receiving a cylinder closing function closing requirement, and removing a cylinder closing operation instruction by the central control system;

and (3) fully opening the shutoff valve of the intake manifold needing to be closed, and controlling the shutoff valve to be fully opened by the central control system.

In a specific implementation scheme, the combustion uniformity of each cylinder of the multi-cylinder engine is judged by a crankshaft timing signal detection mechanism, and the central control system receives a signal of the crankshaft timing signal detection mechanism and controls a plurality of shutoff valves to correspondingly adjust air intake amount so as to enable the plurality of cylinders to combust uniformly and/or operate in a closed cylinder mode.

By the control method, the problem of inconsistent air inflow of each cylinder can be solved, and the cylinder closing function of the engine can be met. Under the condition of idling or small load working condition of the engine, the NVH of the whole vehicle is improved, and the oil consumption of the whole vehicle is reduced.

Drawings

In order to more clearly illustrate one or more embodiments or prior art solutions of the present specification, the drawings that are needed in the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the description below are only one or more embodiments of the present specification, and that other drawings may be obtained by those skilled in the art without inventive effort.

FIG. 1 is a schematic structural diagram of an engine intake manifold assembly according to an embodiment of the present disclosure;

FIG. 2 is a flowchart illustrating a first method of controlling an intake manifold assembly of an engine according to an embodiment of the present disclosure;

FIG. 3 is a flowchart illustrating a second method of controlling an engine intake manifold assembly according to an embodiment of the present disclosure;

fig. 4 is a block diagram of an electronic device according to an embodiment of the present application.

Detailed Description

For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

It is to be noted that unless otherwise defined, technical or scientific terms used in one or more embodiments of the present specification should have the ordinary meaning as understood by those of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in one or more embodiments of the specification is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In order to facilitate understanding of the engine intake manifold assembly and the control method provided by the embodiment of the application, firstly, an application scenario is explained, in the process of developing a multi-cylinder engine, it is found that when the engine is in idle speed and a small load working point, the problem of poor combustion stability of individual cylinders can occur due to different air intake conditions of cylinders of the engine, and at present, the problem of poor combustion consistency of cylinders can be solved by adjusting the fuel injection quantity of the cylinders of the engine, but the combustion torque of the cylinders of the engine is inconsistent due to the measure, and the NVH of the engine is deteriorated. Meanwhile, in order to realize the cylinder closing function of the engine, a complex device is generally required to be installed so as to close the cylinder inlet function of the individual cylinder of the engine to realize the cylinder closing capability.

To this end, embodiments of the present application provide an engine intake manifold assembly and control method, which are described in detail below with reference to the accompanying drawings.

Referring to FIG. 1, FIG. 1 shows a schematic structural view of an engine intake manifold 1 assembly; the engine intake manifold 1 assembly comprises an intake manifold 2 connected with a throttle valve; the air throttle is a controllable valve for controlling air to enter the engine, and the air can be mixed with gasoline to become combustible mixed gas after entering the air inlet main pipe 2, so that the combustible mixed gas is combusted to form work. It is connected with air filter and engine cylinder, and is called the throat of automobile engine.

The longitudinal section of the air inlet manifold 2 is trumpet-shaped, and the conical end of the air inlet manifold 2, which is far away from the plurality of air inlet manifolds 1, is a throttle air inlet port 3. The air inlet manifold 2 is assembled on the throttle valve through the valve inlet port 3, air is introduced through the throttle valve, and the trumpet-shaped air inlet manifold 2 can better diffuse air.

A plurality of intake manifolds 1 are arranged at the open end of an intake manifold 2. The air input is fully ensured to be distributed. The intake manifold 1 distributes clean air to the cylinder intake ports. The intake manifold 1 must distribute air, fuel mixture, or clean air to the respective cylinders as uniformly as possible, and in order to reduce gas flow resistance and improve intake capacity, the inner wall of the intake manifold 1 should be smooth. In the embodiment of the present application, a plurality of intake manifolds 1 are connected to a plurality of cylinders of a multi-cylinder engine in a one-to-one correspondence. For example, when a four-cylinder engine is matched, the number of the plurality of intake manifolds 1 is four; when the six-cylinder engine is matched, the number of the plurality of intake manifolds 1 is six, and so on.

In addition, when the engine burns at idling and other small load working condition points, the air input of each cylinder of the engine is obviously different due to less air input and inconsistent length, position and airflow state of the air inlet manifold 1 of each cylinder, the combustion state is uneven, the combustion consistency is poor, and the NVH (Noise, Vibration and Harshness) of the whole vehicle is poor when the engine works at idling and small load working conditions. Therefore, the scheme that the flow area of the channel of the intake manifold 1 of each cylinder can be independently adjusted is adopted in the application, and the NVH of the whole automobile is improved.

With continued reference to fig. 1, each intake manifold 1 is internally equipped with a shut-off valve 4 for adjusting the intake air amount of the corresponding cylinder. The shutoff valve 4 is horizontally fitted in the cross-sectional direction of the corresponding intake manifold 1. Thereby realizing independent adjustment of the flow area of the channel of the intake manifold 1 of each cylinder.

In addition, the engine intake manifold 1 assembly in this application still includes central control system and is used for detecting the bent axle timing signal detection mechanism of each jar of the multi-cylinder engine burning homogeneity. The central control system senses the specific position of the crankshaft by receiving a signal pulse of a crankshaft position sensor in the crankshaft timing signal detection mechanism; specifically, the crankshaft position sensor senses the position by checking a notch of a rotating disc of the crankshaft, a high-level pulse is generated at the position with the notch and then is sent to the crankshaft timing signal detection mechanism, and the crankshaft timing signal detection mechanism carries out algorithm processing after receiving an electric signal of the crankshaft position.

The crankshaft timing signal detection mechanism judges the combustion uniformity of each cylinder, and the central control system controls the plurality of shutoff valves 4 to correspondingly adjust the air inflow after receiving the signal of the crankshaft timing signal detection mechanism so as to enable the combustion of the plurality of cylinders to be consistent. Specifically, the shutoff valve 4 is an electric control valve, and the cross-sectional area of the intake manifold 1 of each cylinder is adjusted through the throttle valve 4 independent of each cylinder, so that the intake air amount of each cylinder is adjusted; the central control system controls the throttle valves 4 to correspondingly regulate the flow, which is a common technical method in the prior art and is not described herein in detail.

The central control system controls a plurality of stop valves 4 to enable the multi-cylinder engine to enable a plurality of cylinders to be combusted and operated in a combustion consistency mode and/or a cylinder closing mode in an idling state. Under the state of idling or small load working condition of the engine, NVH of the whole vehicle is improved, and oil consumption of the whole vehicle is reduced.

When the NVH of the whole vehicle is improved, the central control system enables the multi-cylinder engine to enable a plurality of cylinders to burn consistently in an idle state by controlling a plurality of shutoff valves 4, specifically, a crankshaft timing signal detection mechanism judges any cylinder with poor combustion, and the central control system controls the air inflow of the rest cylinders to be consistent with the air inflow of the cylinder with poor combustion.

The large displacement engine adopts the means of closing the jar when the light load operating mode can effectively reduce whole car oil consumption, for this reason in this application in order to reduce whole car oil consumption, makes 1 assembly of engine intake manifold possess the function of closing the jar. When the engine needs to close a certain cylinder, only the cut-off valve 4 of the intake manifold 1 of the cylinder needs to be closed, fresh air is not introduced into the cylinder, and oil is not injected into the cylinder, so that the cylinder closing function is realized.

Specifically, when the central control system controls the plurality of shutoff valves 4 to cause the multi-cylinder engine to perform a cylinder closing operation in an idling state: the central control system controls the shut-off valve 4 inside the intake manifold 1 of the cylinder to be closed to be completely closed. Thereby reducing the oil consumption of the whole vehicle.

In this application, through 1 passageway flow area of each jar air intake manifold of independent regulation to guarantee that each jar of burning is unanimous, have simple structure, can solve the inconsistent difficult problem of each jar air input, can satisfy the engine simultaneously again and close the jar function, both improved whole car NVH, reduced whole car oil consumption again, had very big application prospect.

Referring to fig. 2, fig. 2 is a step chart of a first method for controlling an engine intake manifold 1 assembly according to an embodiment of the present disclosure; the first control method is a control method for adjusting the uniformity of air intake of each cylinder of the engine through the engine intake manifold 1 assembly, and comprises the following steps:

s1, detecting that the delay burning of each cylinder is inconsistent, and judging the cylinder with poor burning; the combustion uniformity of each cylinder of the multi-cylinder engine is judged by a crankshaft timing signal detection mechanism.

S2, a shutoff valve 4 for adjusting the intake manifold 1 of the cylinder with a large intake air amount; making the air inflow of the cylinder with larger air inflow consistent with the air inflow of the cylinder with poorer combustion; after receiving the signal of the crankshaft timing signal detection mechanism, the central control system controls the plurality of shutoff valves 4 to correspondingly adjust the air inflow so as to enable the plurality of cylinders to burn uniformly.

S3, detecting whether the combustion of each cylinder is consistent again; the crankshaft timing signal detection mechanism checks and judges the combustion uniformity of each cylinder of the multi-cylinder engine again. If the combustion of each cylinder is not consistent, the step S2 is repeated;

and S4, ending the adjustment until the combustion of each cylinder is consistent.

Referring to fig. 3, fig. 3 is a step chart of a second control method for the engine intake manifold 1 assembly according to the embodiment of the present application; the second control method is a control method for adjusting each cylinder of the engine to have a cylinder closing function through the engine intake manifold 1 assembly, and comprises the following steps:

and S10, receiving a cylinder closing function opening requirement, and sending a cylinder closing operation instruction by the central control system.

And S20, closing the cut-off valve 4 of the intake manifold 1 needing to be closed, and controlling the cut-off valve 4 to be completely closed by the central control system. When the engine needs to close a certain cylinder, only the cut-off valve 4 on the intake manifold 1 of the cylinder needs to be closed, fresh air is not introduced into the cylinder, and oil is not injected into the cylinder, so that the cylinder closing function is realized.

And S30, receiving a cylinder closing function closing requirement, and removing the cylinder closing operation instruction by the central control system.

And S40, fully opening the cut-off valve 4 of the intake manifold 1 needing to be closed, and controlling the cut-off valve 4 to be fully opened by the central control system.

According to the method, the problem of inconsistent air input of each cylinder can be solved, and the cylinder closing function of the engine can be met. Under the condition of idling or small load working condition of the engine, the NVH of the whole vehicle is improved, and the oil consumption of the whole vehicle is reduced.

Fig. 4 is a schematic diagram illustrating a more specific hardware structure of an electronic device according to this embodiment, where the device may include: a processor 1010, a memory 1020, an input/output interface 1030, a communication interface 1040, and a bus 1050. Wherein the processor 1010, memory 1020, input/output interface 1030, and communication interface 1040 are communicatively coupled to each other within the device via bus 1050.

The processor 1010 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits, and is configured to execute related programs to implement the technical solutions provided in the embodiments of the present disclosure.

The Memory 1020 may be implemented in the form of a ROM (Read Only Memory), a RAM (Random Access Memory), a static storage device, a dynamic storage device, or the like. The memory 1020 may store an operating system and other application programs, and when the technical solution provided by the embodiments of the present specification is implemented by software or firmware, the relevant program codes are stored in the memory 1020 and called to be executed by the processor 1010.

The input/output interface 1030 is used for connecting an input/output module to input and output information. The i/o module may be configured as a component in a device (not shown) or may be external to the device to provide a corresponding function. The input devices may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output devices may include a display, a speaker, a vibrator, an indicator light, etc.

The communication interface 1040 is used for connecting a communication module (not shown in the drawings) to implement communication interaction between the present apparatus and other apparatuses. The communication module can realize communication in a wired mode (such as USB, network cable and the like) and also can realize communication in a wireless mode (such as mobile network, WIFI, Bluetooth and the like).

The bus 1050 includes a path to transfer information between various components of the device, such as the processor 1010, memory 1020, input/output interface 1030, and communication interface 1040.

It should be noted that although the above-mentioned device only shows the processor 1010, the memory 1020, the input/output interface 1030, the communication interface 1040 and the bus 1050, in a specific implementation, the device may also include other components necessary for normal operation. In addition, those skilled in the art will appreciate that the above-described apparatus may also include only those components necessary to implement the embodiments of the present description, and not necessarily all of the components shown in the figures.

Computer-readable media, including both permanent and non-permanent, removable and non-removable media, for storing information may be implemented in any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the spirit of the present disclosure, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present description as described above, which are not provided in detail for the sake of brevity.

In addition, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown in the provided figures, for simplicity of illustration and discussion, and so as not to obscure one or more embodiments of the disclosure. Furthermore, devices may be shown in block diagram form in order to avoid obscuring the understanding of one or more embodiments of the present description, and this also takes into account the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the one or more embodiments of the present description are to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the disclosure, it should be apparent to one skilled in the art that one or more embodiments of the disclosure can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.

While the present disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic ram (dram)) may use the discussed embodiments.

It is intended that the one or more embodiments of the present specification embrace all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit or scope of the disclosure are intended to be included within the scope of the disclosure.

Claims

1. An engine intake manifold assembly is characterized by comprising an intake manifold connected with a throttle valve and a plurality of intake manifolds connected with the intake manifold; wherein the content of the first and second substances,

a shutoff valve used for adjusting the air inflow of the corresponding cylinder is assembled in each air inlet manifold;

2. The engine intake manifold assembly of claim 1, wherein the longitudinal cross section of the intake manifold is flared, and the tapered end of the intake manifold away from the intake manifolds is a throttle intake port.

3. An engine intake manifold assembly according to claim 2, wherein a plurality of said intake manifolds are arranged at the open end of said intake manifold.

4. The engine intake manifold assembly of claim 1, wherein the shutoff valve is horizontally fitted in a cross-sectional direction of the corresponding intake manifold.

5. The engine intake manifold assembly of claim 1, wherein the central control system controls the plurality of shut-off valves to enable the multi-cylinder engine to enable consistent combustion and/or cylinder-closing operation of the plurality of cylinders during idle conditions.

6. The engine intake manifold assembly of claim 5, wherein when the central control system makes the multi-cylinder engine make the combustion of a plurality of cylinders consistent in an idle state by controlling a plurality of the shutoff valves:

the crankshaft timing signal detection mechanism judges any cylinder with poor combustion, and the central control system controls the air input of the other cylinders to be consistent with the air input of the cylinder with poor combustion.

7. The engine intake manifold assembly according to claim 5, wherein when the central control system causes the multi-cylinder engine to operate in the idle state with the cylinders closed by controlling a plurality of the shutoff valves:

the central control system controls the shut-off valve in the intake manifold of the cylinder to be closed to be completely closed.

8. A method of controlling an engine intake manifold assembly, comprising the steps of:

9. The control method of an engine intake manifold assembly according to claim 8, further comprising the step of:

closing a shutoff valve of an intake manifold of a cylinder to be closed, and controlling the shutoff valve to be completely closed by a central control system;

10. The method as claimed in claim 9, wherein the combustion uniformity of each cylinder of the multi-cylinder engine is determined by a crankshaft timing signal detection mechanism, and the central control system receives the signal from the crankshaft timing signal detection mechanism and controls the plurality of shut-off valves to adjust the intake air amount correspondingly to make the plurality of cylinders burn uniformly and/or to close the cylinders.